Clarke, Samuel, 1675–1729, English philosopher and divine. His chief interest was rational theology, and, although a critic of the deists, he was in sympathy with some of their ideas. He supported the theories of Newton and argued with Leibniz in defense of the existence of absolute space. Clarke maintained that ethical law is as constant as mathematical law. His published works include many translations, lectures, sermons, and commentaries. The Leibniz correspondence was published in 1717.